Controllable Four Outlet Power Relay Module version 2 [(Power Switch Tail Alternative)] : ID 2935 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits
4-Channel General Purpose SPDT Relay Controller + 4 GPIO with I2C Interface - IoT Devices & Sensors | Relay Controllers, Current Monitoring & Vibration Sensors
Solid State Relays with AC or DC Control Inputs | Omega